Hi all, i've problem with mounting logical volumes over NFS.
On NFS server, i have following logical volume [root@nfs_server ~]# lvdisplay --- Logical volume --- LV Name /dev/escience/vv_25 VGnfs_servernfs_servernfs_servernfs_servernfs_server escience LV UUID iMhNq7-iC7L-VTDO-Xcwv-a6yv-sEAD-EZWASV LV Write Access read/write LV Status available # open 0 LV Size 5.00 GB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
This logical volume is mounted on NFS server, the group information is taken from LDAP server. [root@nfs_server ~]# mount | grep vv_25 /dev/mapper/escience-vv_25 on /export/escience/vv_25 type ext3 (rw) [root@nfs_server ~]# ls -ld /export/escience/vv_25 drwxrwx--- 3 root vv153 4096 Jun 24 16:04 /export/escience/vv_25
But when i mount /export/escience on the nfs client, i'm missing all the permissions and ownership informations: [root@client ~]# mount.nfs nfs_server:/export/escience/ /mnt/escience [root@client ~]# ls -ld /mnt/escience/vv_25 drwxr-xr-x 2 root root 4096 2009-06-24 16:04 vv_25
The setting of NFS exports is following: [root@nfs_server ~]# cat /etc/exports /export/escience client(rw,sync,no_root_squash) [root@nfs_server ~]# exportfs -v /export/escience client(rw,wdelay,no_root_squash,no_subtree_check,anonuid=65534,anongid=65534)
Server is running latest CentOS 5.3 [root@nfs_server ~]# cat /etc/redhat-release CentOS release 5.3 (Final) [root@nfs_server ~]# uname -a Linux nfs_server 2.6.18-128.1.14.el5 #1 SMP Wed Jun 17 06:38:05 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
No denials from selinux, client's IP is completely opened on firewall.
Is there some possibility to debug the NFS mount process? I don't see nothing more then verbose mode in man, which doesn't provide much informations :( Or is it some configuration issue?
thanks for help, Tomáš Ruprich ruprich@uikt.mendelu.cz DCD IICT MUAF Brno <www.mendelu.cz, is.mendelu.cz> tomyk@jabber.cz
Hi,
2009/6/25 Tomas Ruprich ruprich@uikt.mendelu.cz:
i've problem with mounting logical volumes over NFS.
You are mounting /export/escience and you want to access /export/escience/vv_25 which is another filesystem. NFS (v2 and v3) does not work that way, if you export and mount /export/escience, you will get only the files in that filesystem and not in filesystems mounted below it. It does not traverse mount points.
To achieve what you want, you have to export and mount /export/escience/vv_25 explicitely.
Or you can investigate NFSv4, which AFAIR works the way you are trying to use, but it has many differences from NFSv3 and there is some learning curve involved.
HTH, Filipe
Hi, it is exactly as you're writing, thanks for help.
I've been trying to solve it with NFSv4 for a short while, but it behaved the same way. So at last, i configured autofs, which is mounting all the logical volume mountpoints itself.
Just for the others, here's the way i configured autofs: [root@client]# echo "/net /etc/auto.escience" > /etc/auto.master [root@client]# echo "* -rw,intr,soft,timeo=300,tcp,rsize=32768,wsize=32768 nfs_server:/export/escience/&" > /etc/auto.escience [root@client]# service autofs restart
[root@client]# touch /net/<name_of_the_share>
Thanks again Filipe.
Tomas
Thu, Jun 25, 2009 ve 09:18:11AM -0400, Filipe Brandenburger napsal:
Hi,
2009/6/25 Tomas Ruprich ruprich@uikt.mendelu.cz:
i've problem with mounting logical volumes over NFS.
You are mounting /export/escience and you want to access /export/escience/vv_25 which is another filesystem. NFS (v2 and v3) does not work that way, if you export and mount /export/escience, you will get only the files in that filesystem and not in filesystems mounted below it. It does not traverse mount points.
To achieve what you want, you have to export and mount /export/escience/vv_25 explicitely.
Or you can investigate NFSv4, which AFAIR works the way you are trying to use, but it has many differences from NFSv3 and there is some learning curve involved.
HTH, Filipe _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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Filipe Brandenburger -
Tomas Ruprich